I still can't get over how his costume is just one solid chunk of blue. It needs something more than that skinny yellow belt to break up the color.

It will be broken up; by the frame. I have a feeling Snyder will rarely show full frontals of Supes costume, and if he does, the middle section will be cleverly broken up by shadows, objects in the forground or, like in the shot where he is escorted by the army, by his own hands.